Activity Board in CRM template porblem


I have 3 workspace in monday, for 3 different 3 teams, they are not supposed to be able to see each other content.
But recently when I create an activity using the contact section as you can see in the picture it automatically goes in the activity section as planned. This part is totally normal.

The tricky part arrives when the ‘‘meeting’’ arrives in the activity board, weirdly those activities synchronize with other workspace crms, only the activity board that arrives in other crms because contacts, leads and account are not synchro

thank you very much

Screenshot 2022-09-15 173441